Question: Who started serving as the Zambia head of state on 10-24-1964?
Paraphrase: Give me the name of the person who has been serving as Zambia head of state since October 1964?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q953 p:P35 ?s . ?s ps:P35 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1964')) }